Taxation.java

Taxation.java

package com.clesyclean.service.entities.base;

import java.math.BigDecimal;

import javax.persistence.Embeddable;

import lombok.Data;

@Data
@Embeddable
public class Taxation {
	
	public static final int SCALE = 2;
	public static final int ROUNDING_MODE = BigDecimal.ROUND_HALF_UP;
	
	private BigDecimal net;
	private BigDecimal taxRate;
	private BigDecimal tax;
	private BigDecimal gross;
	
	private Taxation() { }
	
	public static Taxation fromNet(BigDecimal net, BigDecimal taxRate) {
		Taxation t = new Taxation();
		
		t.net = net.setScale(SCALE, ROUNDING_MODE);
		t.taxRate = taxRate.setScale(SCALE, ROUNDING_MODE);
		t.gross = t.net.multiply(Taxation.taxMultiplicator(taxRate)).setScale(SCALE, ROUNDING_MODE);
		t.tax = t.gross.subtract(t.net);
		
		return t;
	}
	
	public static Taxation fromNet(float net, float taxRate) {
		return fromNet(new BigDecimal(net), new BigDecimal(taxRate));
	}
	
	public static Taxation fromGross(BigDecimal gross, BigDecimal taxRate) {
		Taxation t = new Taxation();
		
		t.gross = gross.setScale(SCALE, ROUNDING_MODE);
		t.taxRate = taxRate.setScale(SCALE, ROUNDING_MODE);
		BigDecimal m = Taxation.taxMultiplicator(taxRate);
		t.net = t.gross.divide(m, SCALE, ROUNDING_MODE);
		t.tax = t.gross.subtract(t.net);
		
		return t;
	}
	
	public static Taxation fromGross(float gross, float taxRate) {
		return fromGross(new BigDecimal(gross), new BigDecimal(taxRate));
	}
	
	public static BigDecimal taxMultiplicator(BigDecimal taxRate) {
		BigDecimal normalized = taxRate.divide(BigDecimal.valueOf(100f));
		return BigDecimal.ONE.add(normalized);
	}
		
}